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Urea intercalated encapsulated microalgae composite hydrogels for slow-release fertilizers.
Sarhan, Nada; Arafa, Esraa G; Elgiddawy, Nada; Elsayed, Khaled N M; Mohamed, Fatma.
Afiliação
  • Sarhan N; Department of Biotechnology and Life Sciences, Faculty of Postgraduate Studies for Advanced Sciences (PSAS), Beni-Suef University, Beni-Suef, 62 511, Egypt.
  • Arafa EG; Chemistry Department, Faculty of Science, Beni-Suef University, Salah Salim St., Beni-Suef, 62514, Egypt. Esraa.gaber@science.bsu.edu.eg.
  • Elgiddawy N; Department of Biotechnology and Life Sciences, Faculty of Postgraduate Studies for Advanced Sciences (PSAS), Beni-Suef University, Beni-Suef, 62 511, Egypt.
  • Elsayed KNM; Botany and Microbiology Department, Faculty of Science, Beni-Suef University, Beni-Suef, 62511, Egypt.
  • Mohamed F; Chemistry Department, Faculty of Science, Beni-Suef University, Salah Salim St., Beni-Suef, 62514, Egypt.
Sci Rep ; 14(1): 15032, 2024 07 01.
Article em En | MEDLINE | ID: mdl-38951590
ABSTRACT
In agriculture, hydrogels can be addressed for effective operation of water and controlled-release fertilizers. Hydrogels have a significant ability for retaining water and improving nutrient availability in soil, enhancing plant growth while reducing water and fertilizer usage. This work aimed to prepare a hydrogel composite based on microalgae and biopolymers including chitosan and starch for use as a soil conditioner. The hydrogel composite was characterized by FTIR, XRD, and SEM. All hydrogel properties were studied including swelling degree, biodegradability, water-holding capacity, water retention, and re-swelling capacity in soil and water. The urea fertilizer loading and releasing behavior of the prepared hydrogels were investigated. The results revealed that the range of the maximal urea loading was between 99 and 440%, and the kinetics of loading was fitted with Freundlich model. The urea release % exhibited 78-95%, after 30 days, and the kinetics of release was fitted with zero-order, Higuchi, and Korsmeyer-Peppas models. Furthermore, the prepared hydrogels obtained a significant water-holding capacity, after blending soil (50 g) with small amount of hydrogels (1 g), the capacity increased in the range of 99.4-101.5%. In sum, the prepared hydrogels have the potential to be applied as a soil conditioner.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Ureia / Hidrogéis / Microalgas / Fertilizantes Idioma: En Revista: Sci Rep Ano de publicação: 2024 Tipo de documento: Article

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Ureia / Hidrogéis / Microalgas / Fertilizantes Idioma: En Revista: Sci Rep Ano de publicação: 2024 Tipo de documento: Article